76 lines
2.8 KiB
Plaintext
76 lines
2.8 KiB
Plaintext
/*
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* Copyright (C) 2023 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { EngineKeyFactories, EngineKeyInterface, RequestOption } from '@ohos/imageknife'
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export class CustomEngineKeyImpl implements EngineKeyInterface {
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redefineUrl: (loadSrc: string) => string;
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addOtherInfo: string = "Version=1.0.0;"
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constructor() {
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this.redefineUrl = this.urlNeedClearToken.bind(this);
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}
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// request只读
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generateMemoryCacheKey(loadSrc: string, size: string, transformed: string, dontAnimate: boolean): string {
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return EngineKeyFactories.createMemoryCacheKey(loadSrc, size, transformed, dontAnimate, this.redefineUrl, this.addOtherInfo);
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}
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generateTransformedDiskCacheKey(loadSrc: string, size: string, transformed: string, dontAnimate: boolean): string {
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return EngineKeyFactories.createTransformedDiskCacheKey(loadSrc, size, transformed, dontAnimate, this.redefineUrl, this.addOtherInfo);
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}
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generateOriginalDiskCacheKey(loadSrc: string): string {
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return EngineKeyFactories.createOriginalDiskCacheKey(loadSrc, this.redefineUrl, this.addOtherInfo);
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}
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// 需求场景: 请求图片可能 请求中存在token需要清除， 可以把输入的url清除token后作为key的一部分，这样token发生变化也能命中缓存。
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urlNeedClearToken(url: string): string {
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if (this.isHttpRequest(url)) {
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return this.clearToken(url)
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} else {
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return url;
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}
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}
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isHttpRequest(loadSrc: string) {
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if (typeof loadSrc == "string" && loadSrc.toLowerCase().startsWith("http")) {
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return true;
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}
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return false;
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}
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// 清除url里面中携带的token
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clearToken(url: string): string {
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let retUrl = url.replace(this.findTokenParam(url), "")
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return retUrl;
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}
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// 网络图片加载 可能因为Token问题导致缓存失效
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findTokenParam(url: string): string {
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let tokenParam = "";
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let tokenKeyIndex = url.indexOf("?token=") >= 0 ? url.indexOf("?token=") : url.indexOf("&token=");
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if (tokenKeyIndex != -1) {
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let nextAndIndex = url.indexOf("&", tokenKeyIndex + 1);
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if (nextAndIndex != -1) {
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tokenParam = url.substring(tokenKeyIndex + 1, nextAndIndex + 1);
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} else {
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tokenParam = url.substring(tokenKeyIndex);
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}
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}
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return tokenParam;
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}
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}
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